A good first step for you might be to try acupuncture which rebalances the body, detoxes the body, or even heals specific organs. It is relatively cheap if you have health insurance and it can change your outlook for the better by itself.
I would also try to visit a local hot springs as much as possible which has healing properties and helps detox the body.
I’d also try to convince your parents to make dietary changes, etc. See if they can help you in any way. Maybe try to help around the house in exchange for spending money.
I’d also check out kefir which can be grown at home with milk or water (just add it and it grows). You can get kefir grains online, potentially for cheap or free. Just add milk/water and you have probiotics which will heal the gut. Its very low cost.
If you can jacuzzi, hot tub, steam room, or do sauna this by itself can heal the body and is used around the world for its healing properties.
Another simple tip is to chew your food more; as much as 30 times per each bite. This will aid in digestion.